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coucouclehibou
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Post subject: is it working with iso 15693?  Posted: 11 Dec 2012, 18:22 |
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Joined: 11 Dec 2012, 18:15
Posts: 3
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Hello
Thank you for your wonderful job.
13.56 MgHz is it the frequence of transfert?
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kukata86
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Post subject: Re: is it working with iso 15693? Posted: 15 Dec 2012, 00:51 |
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Joined: 17 Jun 2011, 16:03
Posts: 5
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Sorry if i disappoint you, but ISO 15693 standard is working on higher frequency. Like you told this standart use 13.56 MHz. RFID Emulator is not hardware supported for this frequency. Resonance of the oscillating circuit is maked to work with 125 kHz. If you are electronic hobyist you can reaclculate to work with high freq. with changing value of C4, but you must make shanges to software too, to work with ISO 15693 Encription.
If you make some updates to software or hadware will be grateful to share it with us. Yet it is the main idea of the artile.
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coucouclehibou
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Post subject: Re: is it working with iso 15693? Posted: 17 Dec 2012, 18:40 |
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Joined: 11 Dec 2012, 18:15
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Hello
Thank you for the answer.
So it could not working with mifare
I m not electronician what kind of oscilator is used
Is it LC resonator?
What is the value of the inductance L?
I ll try to calculate the value of C4 but i saw in your post that is change from the calcul.
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kukata86
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Post subject: Re: is it working with iso 15693? Posted: 20 Dec 2012, 22:38 |
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Joined: 17 Jun 2011, 16:03
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Yes, it's LC resonator the value of inductance is around 0,23mH. I hope this helps to your project.
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coucouclehibou
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Post subject: Re: is it working with iso 15693? Posted: 23 Dec 2012, 14:33 |
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Joined: 11 Dec 2012, 18:15
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Thank you for your answer.
I 've already estimate the value of the self.
Another question: it seems that the microchip 12f683 is not working with 13.56 MHz.
I progress
Have a good christmas
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kukata86
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Post subject: Re: is it working with iso 15693? Posted: 29 Dec 2012, 13:04 |
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Joined: 17 Jun 2011, 16:03
Posts: 5
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IC 12F683 can't suppport this 13.56 Mhz high frequency. You must use another faster IC like PIC12F1822. It's with the same footprint. But problem is that more freq. need more power and it's too hard without external batt. It's not imposible to be passive device, but to be with normal consumption the speed will not be so high, around 8 MIPS and can't be added so hard decoded algorithms, just more simple like Crypto1, but like i say, i't not imposible to be maked for 13.56 Mhz. i hope to make this project bigger, will wait your implementations and for your development ideas.
Merry christmas to everybody and happy new year.
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